Related Experiment Video
Updated: Feb 2, 2026
07:13
Biomolecular Imaging of Cellular Uptake of Nanoparticles using Multimodal Nonlinear Optical Microscopy
Published on: May 16, 2022
2.3K
True versus effective Kerr nonlinear response in optical filamentation
Optics Express
|November 25, 2018
Summary
Distinguishing between third-order Kerr effect and higher-order nonlinearities is crucial for understanding optical filamentation. Simulations show higher-order effects significantly impact filament properties, requiring models beyond simple third-order approximations.
Area of Science:
- Nonlinear Optics
- Light-Matter Interactions
Background:
- The optical Kerr effect is a key light-matter interaction in nonlinear optics.
- Optical filamentation is a phenomenon governed by nonlinear optical effects.
Purpose of the Study:
- To differentiate between the third-order Kerr effect and effective Kerr nonlinearity in optical filamentation.
- To investigate the impact of higher-order nonlinearities on filament properties.
Main Methods:
- Comparative simulations were performed.
- Analysis focused on distinguishing low-intensity and high-intensity nonlinear regimes.
Main Results:
- A distinction between third-order Kerr effect and higher-intensity effective Kerr nonlinearity is proposed.
- Simulations reveal that higher-order nonlinearities leave significant signatures on filamentation aspects.
- Simple third-order models may not fully capture all filamentation behaviors.
Conclusions:
- Accurate modeling of optical filamentation requires considering higher-order nonlinearities.
- The effective Kerr nonlinearity at higher intensities differs from the low-intensity third-order Kerr effect.
Related Concept Videos
01:28True Stress and True Strain
844
Engineering stress is calculated as the load divided by the original, undeformed cross-sectional area. It approximates a material under load. This approximation is especially relevant post-yield in ductile materials. Though engineering stress-strain diagrams are often used for their convenience and accessibility, they can sometimes fall short in accuracy, particularly when dealing with large strain values.
In contrast, true stress offers a more precise portrayal. It is computed by dividing the...
In contrast, true stress offers a more precise portrayal. It is computed by dividing the...
844
01:22Nonlinear Pharmacokinetics: Causes of Nonlinearity
730
Nonlinearity in drug pharmacokinetics is caused by various factors influencing how a drug is absorbed, distributed, metabolized, and excreted. Understanding these nonlinear processes is crucial for predicting drug behavior in the body and optimizing drug dosing regimens.
Nonlinear drug absorption can occur when the process is rate-limited by solubility, carrier-mediated transport systems, or saturation of the presystemic gut wall or hepatic metabolism. For instance, high doses of riboflavin...
Nonlinear drug absorption can occur when the process is rate-limited by solubility, carrier-mediated transport systems, or saturation of the presystemic gut wall or hepatic metabolism. For instance, high doses of riboflavin...
730
01:29Application of Nonlinear Inequalities
252
A nonlinear inequality describes a comparison involving an expression that curves or behaves more complexly than a straight line. These inequalities often appear in forms that include squares, products, or variables in the denominator.To solve such an inequality, one starts by rewriting it so that zero appears on one side. For example, the inequality: can be factored as: This form makes it easier to identify the values that cause the expression to equal zero. In this case, the...
252
01:25Introduction to Nonlinear Inequalities
224
Linear and nonlinear inequalities are fundamental for analyzing variable relationships and identifying ranges satisfying specific conditions. A linear inequality involves variables raised only to the first power, resulting in a straight-line graph. This line partitions the coordinate plane into two distinct regions: one that satisfies the inequality and one that does not. Each region represents a set of solutions where the linear relationship holds true under the specified constraint.Nonlinear...
224
01:19Nonlinear Pharmacokinetics: Overview
1.1K
Nonlinear or dose-dependent pharmacokinetics is a phenomenon that occurs when the pharmacokinetic parameters of certain drugs deviate from linear pharmacokinetics at higher doses. These drugs do not follow the expected first-order kinetics, where the rate of drug elimination is directly proportional to the drug concentration. Instead, they exhibit a nonlinear relationship, which can be attributed to several factors.
Nonlinearity can arise due to the saturation of plasma protein-binding or...
Nonlinearity can arise due to the saturation of plasma protein-binding or...
1.1K
01:27Nonlinear Pharmacokinetics: Role of Transporters
293
A drug's nonlinear kinetics can be influenced by a diverse range of transporter proteins that serve as crucial players in drug distribution. These transporters, found within cells, can enhance or reduce local drug concentrations by facilitating the influx or efflux of drugs. For instance, the expression of xenobiotic transporters can be influenced by factors such as age and gender, potentially impacting the linearity of drug response.
Polymorphisms occurring in drug transporters can alter...
Polymorphisms occurring in drug transporters can alter...
293